Because many of you have roses, I want to give you an update on Rose Rosette Virus.  According to an article published in the April 2016 issue of Grower Talks, this virus continues to be a growing problem.  It is specific to all roses, (none are known to be resistant), and is especially severe where large groups of roses, particularly multi-flora roses are grown.  The virus which originates in infected plants, is spread by an eriophyd mite and by propagation/pruning of infected plants.

Symptoms to look for include:

• Pink/red elongated stems (aka canes).
• Distorted buds and flowers.
• Witches brooms, (abnormal growth) at tops of stems.
• Thick distorted stems and excessive thorns. (Note – this may be confused with a mis-application of glyphosate (Round-Up)).
• Stunting followed by defoliation and death.

So, what should you do?

• Remove completely any infected plants and properly dispose as soon as any of the above noted symptoms occur.
• Weekly monitor your plants.
• To prevent the spread of mites, which occur during hot, dry weather, treat with an approved miticide.
• When pruning your roses, sterilize the pruning blades by dipping them in a 10% solution of bleach each time before you make a cut.

Research is ongoing by the USDA, numerous universities, and rose growers seeking how to eliminate/control this pest.  For further updates, go to Facebook.com and search for Combating Rose Rosetta.